Education and demonstration – Means for demonstrating apparatus – product – or surface... – Chalkboard or equivalent means having easily erasable surface
Reexamination Certificate
1999-09-10
2001-02-06
Ackun, Jacob K. (Department: 3712)
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Chalkboard or equivalent means having easily erasable surface
C434S410000, C434S391000, C434S422000
Reexamination Certificate
active
06183262
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a magnetic drawing board for color drawing used for children, and especially to a drawing utensil for color drawing using iron powder of various colors as drawing pigment. Wherein, iron powder of various colors and coarseness is received in powder grooves of an encircled seat, and a magnetic pen is used to attract iron powder of desired colors and then is moved to a magnetic pad used as a drawing area in the encircled seat. And the iron powder is released with its releasing amount and locations being under control, so that an effect of making a colored drawing is obtained. A scraping plate is provided in the encircled seat to collect and scrape the iron powder attracted on the pad and in the drawing into the powder grooves for repeated using.
2. Description of the Prior Art
Conventional drawing utensils include generally coloring pens, crayons, ink, drawing boards and pigment etc. The conventional drawing utensils or articles are unsuitable for children, especially for children within the age of 3 years old to the school age. The children are in the age of enlightenment, the above mentioned conventional drawing utensils or articles are subjected to being put in the mouths or eaten by the children when they are provided for the children, especially those toxic utensils or articles such as crayons, or pigment etc. They shall be paid attention to in order not to be unintentionally eaten by the children.
There is a kind of magnetic drawing board specifically for children; it includes an encircled seat provided therein monochromatic iron powder and a scraping plate. And a magnetic pen is attached on the encircled seat for children to draw pictures in the encircled seat. The monochromatic iron powder is attracted on a film on the encircled seat, and trace of drawing can appear a pattern by drawing with the magnetic pen. When the pattern made with the monochromatic iron powder is to be deleted, it needs only to move the scraping plate, the monochromatic iron powder can then be scraped away and stored in the encircled seat. The monochromatic iron powder can be attracted with the magnetic pen and moved onto the film on the encircled seat at any time. Such conventional drawing board specifically for children has the advantages of capability of repeated using and preventing to be unintentionally eaten by children and thus has been very popular now. However, it has the defect of having only the ability of using monochromatic iron powder (in the original color of the iron powder, i.e., iron gray), and is monotonous in the effect made with the pattern or lines when in drawing. Children will not be interested in such kind of drawing in a long term. And the conventional drawing board is lack of an effect of providing children with a function of enlightenment in identifying and choosing colors. Therefore, it needs improvement.
SUMMARY OF THE INVENTION
In view of the above defect of the conventional magnetic drawing board in lacking of an effect of providing children with a chance of choosing colors for making colored drawings, the inventor of the present invention studied and developed a magnetic drawing board for colored drawings used for children. Which drawing board has an effect of providing children with a chance of choosing colors for making colored drawings and of recovering iron powder of various colors to the original positions thereof, and this is the object of the present invention.
To get the above object, the present invention is different from the conventional magnetic drawing board in the magnetic pen, the encircled seat and the iron powder practically used and has the following features:
The magnetic pen is capable of having its nib changed. Each nib has a magnetic seat of the electromagnetic converging style. And the magnetic pen has the ability of controlling the orientation of magnetic poles and the amount of magnetic attraction and repellent in favor of controlling the amount of attracted iron powder of various colors and coarseness, and in favor of controlling the amount and positions of releasing of the iron powder on a magnetic pad in the drawing area.
The encircled seat is made enclosed, a white magnetic pad is provided therein for color drawing. Magnetic force of the white magnetic pad is smaller than that of the magnetic nib, so that the magnetic pen with adjustable attraction force can be used to take suitable amount of iron powder of desired colors and bring it to suitable positions on the white magnetic pad to release gradually the iron powder on the magnetic nib. The white magnetic pad can attract the iron powder immediately in positions to make patterns or lines.
The encircled seat is provided at one edge thereof with a plurality of powder grooves for receiving therein iron powder of various colors and coarseness in favor of attracting and taking suitable amount of iron powder by the magnetic pen to the drawing area on the white magnetic pad for drawing.
The encircled seat is provided on the powder grooves with screens arranged from the one having the largest meshes to the one having the smallest meshes. The meshes are exactly coincident with the various coarseness of the iron powder. Thereby, the largest meshes can receive the iron powder with the largest coarseness, the middle meshes can receive the iron powder with the middle coarseness, and the smallest meshes can receive the iron powder with the smallest coarseness. In this sequence, the iron powder can be classified and put in its powder grooves with screens of suitable meshes rapidly for storing.
The present invention will be apparent after reading the detailed description of the preferred embodiment thereof in reference to the accompanying drawings.
REFERENCES:
patent: Re. 25363 (1963-04-01), Tate
patent: 5324202 (1994-06-01), Meyers et al.
patent: 5335942 (1994-08-01), Grinfas et al.
patent: 5820385 (1998-10-01), Ohashi et al.
patent: 5997309 (1999-12-01), Metheny et al.
Ackun Jacob K.
Miller Bena B.
Pro-Techtor Inter-National Services
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